Stabilizer arrangement for a motor vehicle with adjustable rocker pendulum

Abstract

A stabilizer arrangement is provided for a motor vehicle with a stabilizer ( 1 ), which is connected to the vehicle chassis and which is connected, on each side of the vehicle, to a spring-mounted wheel carrier part with a piston-cylinder unit ( 4, 4 ′). Each of the piston-cylinder units ( 4, 4 ′) includes at least one piston ( 8 ), which is movably arranged in a cylinder ( 7 ) and which splits the cylinder into a first and a second cylinder chamber ( 7 a, 7 b). The cylinder chambers are separate from one another. The piston-cylinder units ( 4, 4 ′) are respectively connected in an articulated manner, at one end, to an end of the stabilizer 1 and, at the other end, to a spring-mounted wheel carrier part. The piston ( 8 ) has a connecting line ( 14 ) that connects the first and second cylinder chambers. The respective connecting line ( 14 ) has a nonreturn valve ( 15 ), which acts in one direction. The piston ( 8 ) can be moved into at least one end position.

1. A stabilizer arrangement for a motor vehicle, the stabilizer comprising:
 a stabilizer connected to the vehicle chassis; 
 spring-mounted wheel carrier parts; 
 plural piston-cylinder units each of said piston-cylinder units including a piston movably arranged in a cylinder to define within each said cylinder first and second cylinder chambers, which are separate from one another each of said piston-cylinder units being connected in an articulated manner, at one end, to an end of said stabilizer, and at the other end, to one of said spring-mounted wheel carrier parts, each said piston having a connecting line that connects said first and second cylinder chambers and a first nonreturn valve which acts in one direction, each said piston being movable into at least one end position, each of said piston-cylinder units having a bypass line arranged outside of said first cylinder chamber and said second cylinder chamber, said bypass line connecting said two cylinder chambers, each of said piston-cylinder units having a second nonreturn valve arranged in said bypass line, said second nonreturn valve blocking one or more of a flow of fluid from said first cylinder chamber to said second cylinder chamber and the flow of fluid from said second cylinder chamber to said first cylinder chamber with said second nonreturn valve in a blocking position, wherein fluid in said second cylinder chamber moves from said second cylinder chamber to said first cylinder chamber via said first nonreturn valve with said second nonreturn valve in said blocking position. 
 
     
     
       2. A stabilizer arrangement in accordance with  claim 1 , wherein said nonreturn valve arranged in said bypass line in relation to said at least one nonreturn valve arranged in said piston acts in the opposite direction. 
     
     
       3. A stabilizer arrangement in accordance with  claim 1 , wherein said second nonreturn valve arranged in said bypass line is movable between said blocking position and an unblocked position, wherein fluid flows from said first cylinder chamber to said second cylinder chamber via said bypass line with said second nonreturn valve in said unblocked position, wherein fluid is provided in said second cylinder chamber with said second nonreturn valve in said unblocked position, said first cylinder chamber receiving said fluid in said second cylinder chamber with said second nonreturn valve via said first nonreturn valve with said second nonreturn in said blocking position such that said piston is in said at least one end position, said piston moving within said cylinder with said second nonreturn valve in said unblocked position. 
     
     
       4. A stabilizer arrangement in accordance with  claim 3 , wherein said nonreturn valve arranged in said bypass line can be unblocked or blocked by means of an electromagnetic actuation. 
     
     
       5. A stabilizer arrangement in accordance with  claim 1 , wherein with said nonreturn valve arranged unblocked in said bypass line, said piston can move freely in said cylinder, and with said nonreturn valve blocked, said piston can only be moved in the direction of a limit stop. 
     
     
       6. A stabilizer arrangement in accordance with  claim 1 , wherein the at least one end position of said piston is formed by a cylinder housing or a cylinder bottom, which closes the cylinder housing. 
     
     
       7. A stabilizer arrangement in accordance with  claim 1 , wherein a limit switch is arranged in said cylinder. 
     
     
       8. A stabilizer arrangement in accordance with  claim 1 , wherein said piston is embodied as double-acting with a through piston rod. 
     
     
       9. A stabilizer arrangement in accordance with  claim 1 , wherein said second nonreturn valve is arranged in said bypass line at a position above said second cylinder chamber. 
     
     
       10. A motor vehicle stabilizer arrangement comprising:
 a stabilizer connected to the vehicle chassis; 
 a first spring-mounted wheel carrier part; 
 a second spring-mounted wheel carrier part; 
 a first piston-cylinder unit including a first unit piston arranged in a first unit cylinder to define within said first unit cylinder a first unit first cylinder chamber and a first unit second cylinder chamber separate from said first unit first cylinder chamber, said first piston-cylinder unit being connected in an articulated manner to a first end of said stabilizer and being connected in an articulated manner to said first spring-mounted wheel carrier part, said first unit piston having a first unit connecting line that connects said first unit first cylinder chamber to said first unit second cylinder chamber and having a first unit first nonreturn valve acting in one direction, said first unit piston being moveable into at least one end position, said first piston-cylinder unit comprising a first unit bypass line arranged outside of said first unit first cylinder chamber and said first unit second cylinder chamber, said first unit bypass line connecting said first unit first cylinder chamber and said first unit second cylinder chamber, said first piston-cylinder unit having a first unit second nonreturn valve arranged in said first unit bypass line, said first unit second nonreturn valve blocking a flow of fluid from said first unit first cylinder chamber to said first unit second cylinder chamber and the flow fluid from said first unit second cylinder chamber to said first unit first cylinder chamber with said first unit second nonreturn valve in a blocking position, wherein fluid in said first unit second cylinder chamber flows from said first unit second cylinder chamber to said first unit first cylinder chamber via said first unit first nonreturn valve with said first unit second nonreturn valve in said blocking position; and 
 a second piston-cylinder unit including a second unit piston arranged in a second unit cylinder to define within said second unit cylinder a second unit first cylinder chamber and a second unit second cylinder chamber separate from said second unit first cylinder chamber, said second piston-cylinder unit being connected in an articulated manner to a second end of said stabilizer and being connected in an articulated manner to said second spring-mounted wheel carrier part, said second unit piston having a second unit connecting line that connects said second unit first cylinder chamber to said second unit second cylinder chamber and having a second unit nonreturn valve acting in one direction, said second unit piston being moveable into at least one end position, said second piston-cylinder unit comprising a second unit bypass line arranged outside of said second unit first cylinder chamber and said second unit second cylinder chamber, said second unit bypass line connecting said second unit first cylinder chamber and said second unit second cylinder chamber, said second piston-cylinder unit having a second unit second nonreturn valve arranged in said second unit bypass line, said second unit second nonreturn valve blocking a flow of fluid from said second unit first cylinder chamber to said second unit second cylinder chamber and the flow fluid from said second unit second cylinder chamber to said second unit first cylinder chamber with said second unit second nonreturn valve in a blocking position, wherein fluid in said second unit second cylinder chamber flows from said second unit second cylinder chamber to said second unit first cylinder chamber via said second unit first nonreturn valve with said second unit second nonreturn valve in said blocking position. 
 
     
     
       11. A stabilizer arrangement in accordance with  claim 10 , wherein said first unit second nonreturn valve is arranged in said first unit bypass line at a position above said first unit second cylinder chamber, said second unit second nonreturn valve being arranged in said second unit bypass line at a position above said second unit second cylinder chamber. 
     
     
       12. A stabilizer arrangement in accordance with  claim 10 , wherein said first unit second nonreturn valve arranged in said bypass line is movable from said blocking position to an unblocked position, wherein fluid flows from said first unit first cylinder chamber to said first unit second cylinder chamber via said first unit bypass line with said first unit second nonreturn valve in said unblocked position, wherein fluid is provided in said first unit second cylinder chamber with said first unit second nonreturn valve in said unblocked position, said first unit first cylinder chamber receiving said fluid in said first unit second cylinder chamber with said first unit second nonreturn valve via said first unit first nonreturn valve with said first unit second nonreturn in said blocking position such that said first unit piston is in said at least one end position, said first unit piston moving within said first unit cylinder with said first unit second nonreturn valve in said unblocked position. 
     
     
       13. A stabilizer arrangement in accordance with  claim 12 , wherein said second unit second nonreturn valve arranged in said second unit bypass line is movable from said blocking position to an unblocked position, wherein fluid flows from said second unit first cylinder chamber to said second unit second cylinder chamber via said second unit bypass line with said second unit second nonreturn valve in said unblocked position, wherein fluid is provided in said second unit second cylinder chamber with said second unit second nonreturn valve in said unblocked position, said second unit first cylinder chamber receiving said fluid in said second unit second cylinder chamber with said second unit second nonreturn valve via said second unit first nonreturn valve with said second unit second nonreturn in said blocking position such that said second unit piston is in said at least one end position, said second unit piston moving within said second unit cylinder with said second unit second nonreturn valve in said unblocked position. 
     
     
       14. A stabilizer arrangement in accordance with  claim 13 , wherein said first unit second nonreturn valve arranged in said first unit bypass line moves between said unblocked position and said blocking position by means of an electromagnetic actuation, wherein said second unit second nonreturn valve arranged in said second unit bypass line between said unblocked position to said blocking position via electromagnetic actuation. 
     
     
       15. A stabilizer arrangement in accordance with  claim 10 , wherein said first unit piston moves freely in said first unit cylinder with said first unit second nonreturn valve in said unblocked position, said first unit piston being movable in the direction of a first unit limit stop with said first unit second nonreturn valve in said blocking position, wherein said second unit piston moves freely in said second unit cylinder with said second unit second nonreturn valve in said unblocked position, said second unit piston being movable in the direction of a second unit limit stop with said second unit second nonreturn valve in said blocking position. 
     
     
       16. A stabilizer arrangement in accordance with  claim 10 , wherein the at least one end position of said first unit piston is formed by a first unit cylinder housing or a first unit cylinder bottom, which closes the first unit cylinder housing, wherein the at least one end position of said second unit piston is formed by a second unit cylinder housing or a second unit cylinder bottom, which closes the second unit cylinder housing. 
     
     
       17. A stabilizer arrangement for a motor vehicle, the stabilizer comprising:
 a stabilizer connected to the vehicle chassis; 
 spring-mounted wheel carrier parts; 
 plural piston-cylinder units each of said piston-cylinder units including a piston movably arranged in a cylinder to define within each said cylinder first and second cylinder chambers, which are separate from one another each of said piston-cylinder units being connected in an articulated manner, at one end, to an end of said stabilizer, and at the other end, to one of said spring-mounted wheel carrier parts, each said piston having a connecting line that connects said first and second cylinder chambers and a first nonreturn valve which acts in one direction, each said piston being movable into at least one end position, each of said piston-cylinder units having a bypass line arranged outside of said first cylinder chamber and said second cylinder chamber, said bypass line connecting said two cylinder chambers, each of said piston-cylinder units having a second nonreturn valve arranged in said bypass line, said second nonreturn valve blocking a flow of fluid from said first cylinder chamber to said second cylinder chamber and the flow of fluid from said second cylinder chamber to said first cylinder chamber with said second nonreturn valve in a blocking position, wherein fluid in said second cylinder chamber flows from said second cylinder chamber to said first cylinder chamber via said first nonreturn valve with said second nonreturn valve in said blocking position, wherein said stabilizer transmits torque from one side of the motor vehicle to another side of the motor vehicle with said second nonreturn valve in said blocking position. 
 
     
     
       18. A stabilizer arrangement in accordance with  claim 17 , wherein said second nonreturn valve arranged in said bypass line is movable from said blocking position to an unblocked position, wherein fluid flows from said first cylinder chamber to said second cylinder chamber via said bypass line with said second nonreturn valve in said unblocked position, wherein fluid is provided in said second cylinder chamber with said second nonreturn valve in said unblocked position, said first cylinder chamber receiving said fluid in said second cylinder chamber with said second nonreturn valve via said first nonreturn valve with said second nonreturn valve in said blocking position such that said piston is in said at least one end position, wherein said stabilizer does not transmit torque from the one side of the motor vehicle to the another side of the motor vehicle with said second nonreturn valve in said unblocked position. 
     
     
       19. A stabilizer arrangement in accordance with  claim 18 , wherein said piston moves freely in said cylinder with said second nonreturn valve in said unblocked position, said piston moving only in the direction of a limit stop with said nonreturn valve in said blocking position. 
     
     
       20. A stabilizer arrangement in accordance with  claim 17 , wherein said nonreturn valve arranged in said bypass line can be unblocked or blocked by means of an electromagnetic actuation.